Tuning device for wireless telegraphy and telephony.



W. E. D. STORES, Jn. da G. W. DAVIS. A TUNING DEVICE PoE `WIRELESS TELEGEAPEY AND TELEPHONY. APPLICATIONy FILED 00T. 9, 1909. RENEWED FEB. 4, 1911.

1,043,272. n Patented Nov. 5, 1912.

UNITED STATES..

WILLIAM E. D. STOKES, JB., OF YORK,

PafrENfJf-JV Qualen.;

n. Y., AND. GEORGE w. Davis or Gamma* NEW JERSEY, ASSIQNORS T0 WILLIAM D. STORES, 0F NEW YORK, N.' Y.

TUNING DEV-ICE FOB TELEGRAPEY TELEPIIQNY. l

Specication of Letters Intent,

Patented Nov. 5, 19.12'.

Application led ctober 9, 1908, Serial No. 457,011. Renewed ebruary 4, 1911-. Serial No. 806,646.

To all whom fit may concm: g

Be it known that we, WILLIAM E. D.

Sroims, J r., and VGEORGE W. Davis citizens 1' of the United States, residing at New York,

Tuning Device for Wireless Telegraphy and' Telephony, of which the following 1saspecification. V

In. wireless telegraphy and telephony, it is necessary to tune or adjust coperating circuits so that they will act inresonance. In making such `adjustments it is desirable to provide means for adjustin the inductance of each circuit, and to adjust the relation of the two circuits with each other.`

The present invention relates to a simple device by which these adjustments can be quickly andaccurately made.

Referring to theaccompanyin drawing forming part of this application go Figure 1 is a side elevation partly in section of vthe improved device; and Fig. 2 is an end view thereof.

The device consists of insulating material having af -slot cut through the saine.

v Bdesignates a standard made of insu lating material, and having a twhich tits into said T-slot, and which standard lcan be permanently attached to the' basepiece Abya screw or bolt 1() threaded into the side thereof. The upper part of the standard B is made 'semi-cylindrical' in shape, and fitted to the same is a yoke Cv which is held to the standard B bys'crews 11. Clamped between the standard B andv yoke C is ahollow cylinder D, made out of insulating material as hard rubber. Wound.

on the outside of this cylinder is a coil E of wire, which coil can have'its spirals separated from each other or which can be formed of insulated wire. A binding post 12 isfconnected to the left-hand end of the coil E. A metallic rod 131is secured toan v,arm 14 projecting upr` from the .yoke C. Fitted to slide on the rod13' is a traveler 15 which carries at its lower` end a flat.

spring 16, the tension of which. is adjusted b.y a screw 17. This spring is ad usted .to bear tightly lon the convolutionso the coil E, and if the coil E formed of insulatedr patent,`

a baseiece A' of' wire the insulation is scraped away on. the line where the spring 16 engages the coil.

l and` in the rod 13, which screw has an opert'ating head or knob 19. This screw' is Qthreaded into the traveler 15. A binding post 20 is secured to the rod 13. IOne wire post 12. The wire a may lead to the aerial, f and the wire b may lead to theground if it yis desired to use the device withl this ciricuitl By 'turning the knob 19,.the position of the carrieril can be adjust-ed longitudinally, and hence the number of turns of the Acoil E included in the circuit a-'b -can fbe adjusted, whereby the inductance of said circuit can be varied `or adjusted.

l Anotherstanda'rd F of insulatingmaterial is provided' with'a foot to fit in the T- slot in the basepiece A. The position of this standard F longitudinally can be ad juste'd by a screw 21 which is threaded into journaled in a plate 22-securedi theend lwith' a knob 23, and byturning t is knob the position of the standard F can; be adjusted. Thetop of the'standard is made in the' form of `a semi-cylinder, and secured -to the top of the same isa yoke 24, A

cylinder G of insulating material is held beltweenthe top of the standard F- and the yoke 24. Woundon the outside of this cylinder is a Vcoilof wire H. The inner end of this coil is connected to `a post 25 which connects -by a spring wire 26 tola binding PS'I 27.` n

-metallic arm 28'which has a` rod 29 projt- 'ing inside of the cylinder Gr. IA screw 30 is a is connected to the binding post 20, and aanother wire b is connected to the binding of' the base A. The screw 21 is. lrovided` A screw 18` is fit-ted in the projection 14,

the 'foot of the same and which screw is Secured to the lmovable standard F `is a f secured in th'earm 28, andin vthe end of the v rod 29. This screw engages a traveler 31 fitted on the rod 29 which /traveler has a spring'- arm 32 working-through a slot L cut in the cylinder G,'r the tension of which s ring arm can be adjusted by a screw 33.

which connects by a spring wire 36 to va bindingl post'37. The .second circuit c-d is connected to the binding posts '27- and 37. 4By turning theA knob34.as man tur-ns or he screw 30 is providedwith a knob 34.' The arm 28 has a post 35 secured thereto` coils ofthe coil H can' be inclu ed in this l i circuit-ias desired. The diameter of the coil H is such that the same will tit inside of the cylinder D, and the cylinders D and G are arranged in linev so that the coil H can be adjusted inside the coil E as far as desired. By this arrangement the inductance of each circuit can be quickly and accurately adjusted, and the position of the two coils can be adjusted relatively to each other, whereby the action between the two coils can also be regulated. j

The device can be used for adjusting the inductance of any two circuits, and for adjusting the action of the two circuits on each other. The device therefore provides a convenient, simple, and readily acting means for the purposes stated.

The details and arrangements herein shown and described may be greatly varied by a skilled mechanic without departing from the scope of our invention as expressed in the claims.

Having thus fully described our invention, what we claim and desire to secure by Letters-Patent is 1. The combination of a cylinder, an inductance wound thereon, means outside of the c linder for adjustin the numberA of coils included in the circuit, a second cylinder, an inductance wound thereon, which second cylinder and inductance'can be adjusted inside of the first cylinder and inductance, and means arranged inside of the second cylinder for adjusting the number of coils which can be included in the second circuit.

2. In a device of the class described, the combination of a cylinder having a spiral inductance Wound thereon, an adjustable traveler engaging the same, a second cylinder having an inductance wound thereon, and provided with a slot, and an adjustable traveler arranged inside thereof, and making contact with the inductance through the slotin the second cylinder.

3. The combination of a base, a standard carrying a cylinder of insulating material, an inductance wound thereon, an adjustable traveler carrying a contact engaging the inductance, a standard movably mounted in the base, means for adjusting the position thereof, a cylinder of insulating material carried by 'the movable'standard, an inductance Wound thereon, and an adjustable traveler arranged inside of the second cylinder and engaging the second inductance through a slot cut in said cylinder, the second cylinder and inductance being arranged to fit inside of the first cylinder.

In testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses. i

WILLIAM E. D. STORES, JR. GEORGE W. DAVIS. Witnesses:

FREDERICK L. SEARING, A. H. GLEAsoN. 

